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Forked from Restuta/HOC.js
Created January 31, 2022 09:50
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React HOC (Higher Order Component) Example
/* HOC fundamentally is just a function that accepts a Component and returns a Component:
(component) => {return componentOnSteroids; } or just component => componentOnSteroids;
Let's assume we want to wrap our components in another component that is used for debugging purposes,
it just wraps them in a DIV with "debug class on it".
Below ComponentToDebug is a React component.
*/
//HOC using Class
//it's a function that accepts ComponentToDebug and implicitly returns a Class
let DebugComponent = ComponentToDebug => class extends Component {
render() {
return (
<div className="debug">
<ComponentToDebug {...this.props}/>
</div>
);
}
};
//similar HOC using pure function
//it's a function that accepts ComponentToDebug and explicitly returns a Functional component
let DebugComponent = (ComponentToDebug) => {
return (props) => (
<div className="debug">
<ComponentToDebug {...props}/>
</div>
);
};
//above component can be simplified omitting extra () around parameters and using implicit return
let DebugComponent = ComponentToDebug => (
props => (
<div className="debug">
<ComponentToDebug {...props}/>
</div>
)
);
//or even further omitting extra ()
let DebugComponent = ComponentToDebug => props => (
<div className="debug">
<ComponentToDebug {...props}/>
</div>
);
//finally any definition can be used like that:
DebugComponent(MyComponent);
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